hand = (function() {
    function hand() {
      this.held_item = null;
    }
    hand.prototype.interact_at = function(x, y) {
      if (this.held_item !== null) {
        return this.drop_tile_if_over_it(x, y);
      } else {
        return this.pick_up_tile_if_over_it(x, y);
      }
    };
    hand.prototype.move_to = function(x, y) {
      if (this.held_item !== null) {
        return this.held_item.drag_to(x, y);
      }
    };
    hand.prototype.can_interact_with = function(touchable_game_pieces) {
      return this.game_pieces = touchable_game_pieces;
    };
    hand.prototype.drop_tile_if_over_it = function(x, y) {
      var game_piece, _i, _len, _ref, _results;
      _ref = this.game_pieces;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        game_piece = _ref[_i];
        if (game_piece.is_at(x, y)) {
          this.held_item = null;
          break;
        }
      }
      return _results;
    };
    hand.prototype.pick_up_tile_if_over_it = function(x, y) {
      var game_piece, _i, _len, _ref, _results;
      _ref = this.game_pieces;
      _results = [];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        game_piece = _ref[_i];
        if (game_piece.is_at(x, y)) {
          this.held_item = game_piece;
          this.held_item.start_dragging(x, y);
          break;
        }
      }
      return _results;
    };
    return hand;
  })();